Ed,
Sounds to me like they need to find
themselves a good mechanic… or maybe they just did?
Mark S.
Well, I know nothing about rotax engines but that sounded
like fuel starvation at higher power settings. I asked what type fuel
pump they had and it turns out it is a diaphragm type driven by
pulsation's from the engine via a tube. Sure enough as I looked it over,
I found that the tube from the engine to the pump that provided the suction
pulses to work the diaphragm was crimped almost shut near the pump where it was
difficult to see. Clearly not a good condition, I point this out to them
and they rapidly put on a new tube.
Fired it up and got almost 6000 rpm on the ground.
Took off and look like he was going straight up - a marked difference in
performance. Don't know if this condition would have resulted in an
accident - but clearly not a good situation.